| abstract |
The disclosure refers to a medical device comprising a measurement unit adapted to measure a value of a physiological parameter, for example a blood glucose level, an energy storage unit providing energy supply for the measurement unit, an NFC antenna, an energy supply unit that controls the NFC antenna such that in the presence of an electromagnetic field of a pre-defined frequency range energy is withdrawn from the electromagnetic field surrounding the NFC antenna and stored in the energy storage unit, a charge control unit adapted to determine the electric charge contained in the energy storage unit, and a communication unit adapted to output a pre-defined visible, audible and/or tactile signal if the electric charge contained in the energy storage unit determined by the charge control unit is equal to or below a pre-defined minimum charge value. |